U.S. patent application number 15/958592 was filed with the patent office on 2018-12-20 for persistent paging collision enhancement using dynamically switched higher-order antennas in idle-mode.
The applicant listed for this patent is QUALCOMM Incorporated. Invention is credited to Tom Chin, Thawatt Gopal, Reza Shahidi.
Application Number | 20180368098 15/958592 |
Document ID | / |
Family ID | 64658561 |
Filed Date | 2018-12-20 |
United States Patent
Application |
20180368098 |
Kind Code |
A1 |
Gopal; Thawatt ; et
al. |
December 20, 2018 |
PERSISTENT PAGING COLLISION ENHANCEMENT USING DYNAMICALLY SWITCHED
HIGHER-ORDER ANTENNAS IN IDLE-MODE
Abstract
Methods, systems, and devices for wireless communications are
described. A wireless device may detect a collision of paging
messages for a first subscription and a second subscription of the
wireless device during a paging processing duration, the first
receive chain including at least one antenna path. The wireless
device may determine that, in a connected mode, it is configured to
operate a second receive chain with one or more additional antenna
paths, and may allocate, for a subsequent instance of the paging
processing duration, the first subscription to one of the first
receive chain or the second receive chain, and the second
subscription to the other of the first receive chain or the second
receive chain. The wireless device may monitor, during the
subsequent instance of the paging processing duration, for a first
paging message and a second paging message using the first and
second receive chains.
Inventors: |
Gopal; Thawatt; (San Diego,
CA) ; Chin; Tom; (San Diego, CA) ; Shahidi;
Reza; (San Diego, CA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
QUALCOMM Incorporated |
San Diego |
CA |
US |
|
|
Family ID: |
64658561 |
Appl. No.: |
15/958592 |
Filed: |
April 20, 2018 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
62520425 |
Jun 15, 2017 |
|
|
|
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H04W 74/0858 20130101;
H04W 76/15 20180201; H04W 68/02 20130101; H04W 72/0453 20130101;
H04W 88/06 20130101; H04W 72/06 20130101 |
International
Class: |
H04W 68/02 20060101
H04W068/02; H04W 76/15 20060101 H04W076/15; H04W 72/06 20060101
H04W072/06 |
Claims
1. A method for wireless communication, comprising: detecting,
using a first receive chain of a user equipment (UE) in an idle
mode operating in at least one frequency band, a collision of
paging messages for a first subscription and a second subscription
of the UE during a paging processing duration, the first receive
chain including at least one antenna path; determining that, in a
connected mode, the UE is configured to operate a second receive
chain with one or more additional antenna paths in the at least one
frequency band; allocating, for a subsequent instance of the paging
processing duration, the first subscription to one of the first
receive chain or the second receive chain, and the second
subscription to the other of the first receive chain or the second
receive chain; and monitoring, during the subsequent instance of
the paging processing duration, for a first paging message and a
second paging message using the first and second receive
chains.
2. The method of claim 1, wherein: the at least one frequency band
includes a group of non-contiguous frequency bands.
3. The method of claim 1, wherein the monitoring further comprises:
monitoring at least one antenna path of one of the first receive
chain or the second receive chain allocated to the first
subscription for the first paging message, and at least one antenna
path of the other of the first receive chain or the second receive
chain allocated to the second subscription for the second paging
message.
4. The method of claim 1, wherein the allocating further comprises:
determining a performance metric for each of the antenna paths for
the first receive chain and the second receive chain, wherein the
performance metric is one or more of a Reference Signal Received
Power (RSRP), a Received Signal Strength Indicator (RSSI), a
Reference Signal Received Quality (RSRQ), a Signal to Noise Ratio
(SNR), or a Block Error Rate (BLER).
5. The method of claim 4, further comprising: ranking the antenna
paths for the first receive chain and the second receive chain
based at least in part on the determined performance metrics.
6. The method of claim 5, wherein: the allocating is based at least
in part on the ranking.
7. The method of claim 6, wherein: the allocating is based at least
in part on determining that the performance metrics for each of the
antenna paths for the first receive chain or the second receive
chain do not satisfy a threshold for the first subscription and the
second subscription.
8. The method of claim 6, wherein: the allocating is based at least
in part on determining that the performance metrics for each of the
antenna paths for the first receive chain and the second receive
chain do not satisfy a threshold for one of the first or second
subscriptions.
9. The method of claim 4, wherein: the allocating allocates the
first subscription to the at least one antenna path on the first
receive chain and the second subscription to the one or more
additional antenna paths on the second receive chain based at least
in part on determining that each of the performance metrics
satisfies a threshold.
10. The method of claim 1, wherein the monitoring further
comprises: decoding the first paging message and the second paging
message.
11. The method of claim 10, further comprising: entering a low
power mode subsequent to decoding the first paging message and the
second paging message; and exiting the low power mode during a next
instance of the paging processing duration.
12. The method of claim 1, wherein the monitoring further
comprises: concurrently operating the first receive chain and the
second receive chain during the subsequent instance of the paging
processing duration.
13. The method of claim 1, wherein the detecting further comprises:
determining that a number of collisions of the paging messages
exceeds a threshold.
14. The method of claim 1, wherein the determining further
comprises: determining that the UE supports Higher Order Receive
Diversity (HOR.times.D), or 4.times.4 Multiple Input Multiple
Output (MIMO), or both.
15. The method of claim 1, wherein: the UE supports multiple
subscription capabilities, and the first subscription corresponds
to a first Long Term Evolution (LTE) subscription, and the second
subscription corresponds to a second LTE subscription, a wideband
code division multiple access (WCDMA) subscription, or any other
3rd Generation Partnership Project (3GPP) wireless access
technology.
16. The method of claim 1, wherein: the determining is based at
least in part on an antenna configuration, antenna capability of
the UE, or both.
17. An apparatus for wireless communication, comprising: a
processor; memory in electronic communication with the processor;
and instructions stored in the memory and executable by the
processor to cause the apparatus to: detect, using a first receive
chain of the apparatus in an idle mode operating in at least one
frequency band, a collision of paging messages for a first
subscription and a second subscription of a user equipment (UE)
during a paging processing duration, the first receive chain
including at least one antenna path; determine that, in a connected
mode, the apparatus is configured to operate a second receive chain
with one or more additional antenna paths in the at least one
frequency band; allocate, for a subsequent instance of the paging
processing duration, the first subscription to one of the first
receive chain or the second receive chain, and the second
subscription to the other of the first receive chain or the second
receive chain; and monitor, during the subsequent instance of the
paging processing duration, for a first paging message and a second
paging message using the first and second receive chains.
18. The apparatus of claim 17, wherein: the at least one frequency
band frequency band includes a group of non-contiguous frequency
bands.
19. The apparatus of claim 17, wherein the monitoring comprises
instructions further executable by the processor to: monitor at
least one antenna path of one of the first receive chain or the
second receive chain allocated to the first subscription for the
first paging message, and at least one antenna path of the other of
the first receive chain or the second receive chain allocated to
the second subscription for the second paging message.
20. The apparatus of claim 17, wherein the allocating comprises
instructions further executable by the processor to: determine a
performance metric for each of the antenna paths for the first
receive chain and the second receive chain, wherein the performance
metric is one or more of a Reference Signal Received Power (RSRP),
a Received Signal Strength Indicator (RSSI), a Reference Signal
Received Quality (RSRQ), a Signal to Noise Ratio (SNR), or a Block
Error Rate (BLER).
21. The apparatus of claim 20, wherein the instructions are further
executable by the processor to: rank the antenna paths for the
first receive chain and the second receive chain based at least in
part on the determined performance metrics.
22. The apparatus of claim 21, wherein: the allocating is based at
least in part on the ranking.
23. The apparatus of claim 22, wherein: the allocating is based at
least in part on determining that the performance metrics for each
of the antenna paths for the first receive chain and the second
receive chain do not satisfy a threshold for one of the first or
second subscriptions.
24. The apparatus of claim 20, wherein: the allocating allocates
the first subscription to the at least one antenna path on the
first receive chain and the second subscription to the one or more
additional antenna paths on the second receive chain based at least
in part on determining that each of the performance metrics
satisfies a threshold.
25. The apparatus of claim 17, wherein the monitoring comprises
instructions further executable by the processor to: decode the
first paging message and the second paging message; enter a low
power mode subsequent to decoding the first paging message and the
second paging message; and exit the low power mode during a next
instance of the paging processing duration.
26. The apparatus of claim 17, wherein the monitoring comprises
instructions further executable by the processor to: concurrently
operate the first receive chain and the second receive chain during
the subsequent instance of the paging processing duration.
27. The apparatus of claim 17, wherein the detecting comprises
instructions further executable by the processor to: determine that
a number of collisions of the paging messages exceeds a
threshold.
28. The apparatus of claim 17, wherein: the UE supports multiple
subscription capabilities, and the first subscription corresponds
to a first Long Term Evolution (LTE) subscription, and the second
subscription corresponds to a second LTE subscription, a wideband
code division multiple access (WCDMA) subscription, or any other
3rd Generation Partnership Project (3GPP) wireless access
technology.
29. An apparatus for wireless communication, comprising: means for
detecting, using a first receive chain of a user equipment (UE) in
an idle mode operating in at least one frequency band, a collision
of paging messages for a first subscription and a second
subscription of the UE during a paging processing duration, the
first receive chain including at least one antenna path; means for
determining that, in a connected mode, the UE is configured to
operate a second receive chain with one or more additional antenna
paths in the at least one frequency band; means for allocating, for
a subsequent instance of the paging processing duration, the first
subscription to one of the first receive chain or the second
receive chain, and the second subscription to the other of the
first receive chain or the second receive chain; and means for
monitoring, during the subsequent instance of the paging processing
duration, for a first paging message and a second paging message
using the first and second receive chains.
30. A non-transitory computer-readable medium storing code for
wireless communications, the code comprising instructions
executable to: detect, using a first receive chain of a user
equipment (UE) in an idle mode operating in at least one frequency
band, a collision of paging messages for a first subscription and a
second subscription of the UE during a paging processing duration,
the first receive chain including at least one antenna path;
determine that, in a connected mode, the UE is configured to
operate a second receive chain with one or more additional antenna
paths in the at least one frequency band; allocate, for a
subsequent instance of the paging processing duration, the first
subscription to one of the first receive chain or the second
receive chain, and the second subscription to the other of the
first receive chain or the second receive chain; and monitor,
during the subsequent instance of the paging processing duration,
for a first paging message and a second paging message using the
first and second receive chains.
Description
CROSS REFERENCES
[0001] The present Application for Patent claims priority to U.S.
Provisional Patent Application No. 62/520,425 by Gopal et al.,
entitled "Persistent Paging Collision Enhancement Using Dynamically
Switched Higher-Order Antennas in Idle Mode," filed Jun. 15, 2017,
assigned to the assignee hereof, and which is hereby expressly
incorporated by reference herein in its entirety.
BACKGROUND
[0002] The following relates generally to wireless communication,
and more specifically to persistent paging collision enhancement
using dynamically switched higher order antennas in idle mode.
[0003] Wireless communications systems are widely deployed to
provide various types of communication content such as voice,
video, packet data, messaging, broadcast, and so on. These systems
may be capable of supporting communication with multiple users by
sharing the available system resources (e.g., time, frequency, and
power). Examples of such multiple-access systems include code
division multiple access (CDMA) systems, time division multiple
access (TDMA) systems, frequency division multiple access (FDMA)
systems, and orthogonal frequency division multiple access (OFDMA)
systems, (e.g., a Long Term Evolution (LTE) system, or a New Radio
(NR) system). A wireless multiple-access communications system may
include a number of base stations or access network nodes, each
simultaneously supporting communication for multiple communication
devices, which may be otherwise known as user equipment (UE).
[0004] When a base station has information to transmit to a UE, the
base station may transmit a paging message to prompt the UE to
enter a connected state to receive the information. In some cases,
a UE may have the capability of supporting multiple wireless
services or subscriptions (e.g., radio access technologies (RATs),
or subscriber identification modules (SIMs), etc.). Each of the
multiple subscriptions supported by the UE may be associated with a
different paging occasion or wakeup time during a reception time
interval. In some instances, the UE may wake up for a paging
occasion for each of the multiple subscriptions. In some such
instances, conventional solutions for processing pages may be
deficient.
SUMMARY
[0005] The described techniques relate to improved methods,
systems, devices, or apparatuses that support persistent paging
collision enhancement using dynamically switched higher order
antennas in idle mode. A wireless device such as a user equipment
(UE) may support multiple wireless services such as
multi-subscriber identification module (multi-SIM) Long Term
Evolution (LTE) or multi-SIM LTE-Wideband Code Division Multiple
Access (WCDMA), and may operate in an idle mode to conserve power.
The idle mode may be, for example, a discontinuous receive (DRX)
mode. In the DRX mode, the UE may periodically wake up during a
paging processing duration to monitor one or more channels to
determine whether paging information is available for the UE. In
some cases, the UE may operate in a single-receive chain during
idle mode to conserve power, and thus may not support dual
concurrent receive paths on primary and diversity antennas for each
subscription. Furthermore, each wireless service may be associated
with a different wakeup occasion and in some cases, the wakeup
occasions or pages for two wireless services may collide. In some
circumstances, a page processing duration for one subscription
(e.g., a first LTE subscription) may overlap or collide with a page
processing duration of another wireless subscription (e.g., a
second LTE subscription, or a WCDMA subscription). Due to limited
receive capabilities of a single receive chain of the UE in idle
mode, collisions between paging signals transmitted for each of the
subscriptions may occur, and a single receive chain of the UE in
idle mode may be unable to successfully monitor and receive pages
for each subscription within the same frequency band or frequency
band group. Thus, paging performance for the UE may be adversely
impacted.
[0006] To overcome these and other issues, a UE as described herein
may determine whether alternative antenna receive paths associated
with a second (or additional) receive chain are available to
receive paging messages using the same frequency band or frequency
band group as the single receive chain. The determination may be
based in part on the antenna configuration and antenna capabilities
of the UE. For example, in some cases, there may be alternative
antenna paths in addition to the primary and/or diversity antenna
paths for a UE supporting Higher Order Receive Diversity
(HOR.times.D), 4.times.4 Multiple Input Multiple Output (MIMO), or
both, when in connected mode on certain frequency bands. The UE in
idle mode may concurrently use the first and second receive chains
to receive pages for each of the subscriptions, thereby improving
paging performance.
[0007] In some examples, the UE may employ a dynamic decision
making process by estimating or calculating a performance metric
for each subscription on at least one antenna path for each receive
chain. In such cases, the UE may then allocate each subscription to
at least one antenna path of a receive chain, based in part on the
performance metrics. Such techniques may allow for a UE to utilize
one or more higher order antennas to achieve dual-receive chain
concurrency during multi-SIM page demodulation.
[0008] A method of wireless communications is described. The method
may include detecting, using a first receive chain of a UE in an
idle mode operating in at least one frequency band, a collision of
paging messages for a first subscription and a second subscription
of the UE during a paging processing duration, the first receive
chain including at least one antenna path, determining that, in a
connected mode, the UE is configured to operate a second receive
chain with one or more additional antenna paths in the at least one
frequency band, allocating, for a subsequent instance of the paging
processing duration, the first subscription to one of the first
receive chain or the second receive chain, and the second
subscription to the other of the first receive chain or the second
receive chain, and monitoring, during the subsequent instance of
the paging processing duration, for a first paging message and a
second paging message using the first and second receive
chains.
[0009] An apparatus for wireless communications is described. The
apparatus may include means for detecting, using a first receive
chain of the apparatus in an idle mode operating in at least one
frequency band, a collision of paging messages for a first
subscription and a second subscription of the UE during a paging
processing duration, the first receive chain including at least one
antenna path, means for determining that, in a connected mode, the
apparatus is configured to operate a second receive chain with one
or more additional antenna paths in the at least one frequency
band, means for allocating, for a subsequent instance of the paging
processing duration, the first subscription to one of the first
receive chain or the second receive chain, and the second
subscription to the other of the first receive chain or the second
receive chain, and means for monitoring, during the subsequent
instance of the paging processing duration, for a first paging
message and a second paging message using the first and second
receive chains.
[0010] Another apparatus for wireless communications is described.
The apparatus may include a processor, memory in electronic
communication with the processor, and instructions stored in the
memory. The instructions may be operable to cause the processor to
detect, using a first receive chain of a UE in an idle mode
operating in at least one frequency band, a collision of paging
messages for a first subscription and a second subscription of the
UE during a paging processing duration, the first receive chain
including at least one antenna path, determine that, in a connected
mode, the UE is configured to operate a second receive chain with
one or more additional antenna paths in the at least one frequency
band, allocate, for a subsequent instance of the paging processing
duration, the first subscription to one of the first receive chain
or the second receive chain, and the second subscription to the
other of the first receive chain or the second receive chain, and
monitor, during the subsequent instance of the paging processing
duration, for a first paging message and a second paging message
using the first and second receive chains.
[0011] A non-transitory computer-readable medium for wireless
communications is described. The non-transitory computer-readable
medium may include instructions operable to cause a processor to
detect, using a first receive chain of a UE in an idle mode
operating in at least one frequency band, a collision of paging
messages for a first subscription and a second subscription of the
UE during a paging processing duration, the first receive chain
including at least one antenna path, determine that, in a connected
mode, the UE is configured to operate a second receive chain with
one or more additional antenna paths in the at least one frequency
band, allocate, for a subsequent instance of the paging processing
duration, the first subscription to one of the first receive chain
or the second receive chain, and the second subscription to the
other of the first receive chain or the second receive chain, and
monitor, during the subsequent instance of the paging processing
duration, for a first paging message and a second paging message
using the first and second receive chains.
[0012] In some examples of the method, apparatus, and
non-transitory computer-readable medium described above, the at
least one frequency band includes a group of non-contiguous
frequency bands.
[0013] In some examples of the method, apparatus, and
non-transitory computer-readable medium described above, the
monitoring further comprises: monitoring at least one antenna path
of one of the first receive chain or the second receive chain
allocated to the first subscription for the first paging message,
and at least one antenna path of the other of the first receive
chain or the second receive chain allocated to the second
subscription for the second paging message.
[0014] In some examples of the method, apparatus, and
non-transitory computer-readable medium described above, the
allocating further comprises: determining a performance metric for
each of the antenna paths for the first receive chain and the
second receive chain, wherein the performance metric may be one or
more of a Reference Signal Received Power (RSRP), a Received Signal
Strength Indicator (RSSI), a Reference Signal Received Quality
(RSRQ), a Signal to Noise Ratio (SNR), or a Block Error Rate
(BLER).
[0015] Some examples of the method, apparatus, and non-transitory
computer-readable medium described above may further include
processes, features, means, or instructions for ranking the antenna
paths for the first receive chain and the second receive chain
based at least in part on the determined performance metrics.
[0016] In some examples of the method, apparatus, and
non-transitory computer-readable medium described above, the
allocating may be based at least in part on the ranking.
[0017] In some examples of the method, apparatus, and
non-transitory computer-readable medium described above, the
allocating may be based at least in part on determining that the
performance metrics for each of the antenna paths for the first
receive chain or the second receive chain do not satisfy a
threshold for the first subscription and the second
subscription.
[0018] In some examples of the method, apparatus, and
non-transitory computer-readable medium described above, the
allocating may be based at least in part on determining that the
performance metrics for each of the antenna paths for the first
receive chain and the second receive chain do not satisfy a
threshold for one of the first or second subscriptions.
[0019] In some examples of the method, apparatus, and
non-transitory computer-readable medium described above, the
allocating allocates the first subscription to the at least one
antenna path on the first receive chain and the second subscription
to the one or more additional antenna paths on the second receive
chain based at least in part on determining that each of the
performance metrics satisfies a threshold.
[0020] In some examples of the method, apparatus, and
non-transitory computer-readable medium described above, the
monitoring further comprises: decoding the first paging message and
the second paging message.
[0021] Some examples of the method, apparatus, and non-transitory
computer-readable medium described above may further include
processes, features, means, or instructions for entering a low
power mode subsequent to decoding the first paging message and the
second paging message. Some examples of the method, apparatus, and
non-transitory computer-readable medium described above may further
include processes, features, means, or instructions for exiting the
low power mode during a next instance of the paging processing
duration.
[0022] In some examples of the method, apparatus, and
non-transitory computer-readable medium described above, the
monitoring further comprises: concurrently operating the first
receive chain and the second receive chain during the subsequent
instance of the paging processing duration.
[0023] In some examples of the method, apparatus, and
non-transitory computer-readable medium described above, the
detecting further comprises: determining that a number of
collisions of the paging messages exceeds a threshold.
[0024] In some examples of the method, apparatus, and
non-transitory computer-readable medium described above, the
determining further comprises: determining that the UE supports
HOR.times.D, or 4.times.4 MIMO, or both.
[0025] In some examples of the method, apparatus, and
non-transitory computer-readable medium described above, the UE
supports multiple subscription capabilities, and the first
subscription corresponds to a first LTE subscription, and the
second subscription corresponds to a second LTE subscription, a
WCDMA subscription, or any other 3rd Generation Partnership Project
(3GPP) wireless access technology.
[0026] In some examples of the method, apparatus, and
non-transitory computer-readable medium described above, the
determining may be based at least in part on an antenna
configuration, antenna capability of the UE, or both.
BRIEF DESCRIPTION OF THE DRAWINGS
[0027] FIG. 1 illustrates an example of a wireless communications
system that supports persistent paging collision enhancement using
dynamically switched higher-order antennas in idle mode in
accordance with aspects of the present disclosure;
[0028] FIG. 2 illustrates an example of a wireless communications
system that supports persistent paging collision enhancement using
dynamically switched higher-order antennas in idle mode in
accordance with aspects of the present disclosure;
[0029] FIG. 3 illustrates an example of a paging process for a user
equipment (UE) that supports persistent paging collision
enhancement using dynamically switched higher-order antennas in
idle mode in accordance with aspects of the present disclosure;
[0030] FIG. 4 illustrates an example of a flowchart for a UE that
supports persistent paging collision enhancement using dynamically
switched higher-order antennas in idle mode in accordance with
aspects of the present disclosure;
[0031] FIGS. 5 and 6 show diagrams of wireless devices that support
persistent paging collision enhancement using dynamically switched
higher-order antennas in idle mode in accordance with aspects of
the present disclosure;
[0032] FIG. 7 shows a diagrams of a communications manager that
supports persistent paging collision enhancement using dynamically
switched higher-order antennas in idle mode in accordance with
aspects of the present disclosure;
[0033] FIG. 8 illustrates a diagram of a system including a device
that supports persistent paging collision enhancement using
dynamically switched higher-order antennas in idle mode in
accordance with aspects of the present disclosure;
[0034] FIG. 9 shows a flowchart illustrating a method for
persistent paging collision enhancement using dynamically switched
higher-order antennas in idle mode in accordance with aspects of
the present disclosure.
DETAILED DESCRIPTION
[0035] In wireless communications systems, a base station may
transmit a page or a paging message to a user equipment (UE) in a
channel during a particular subframe or set of subframes, which may
be referred to as a paging occasion for the UE. In some cases, the
UE may support multiple wireless subscriptions such as
multi-subscriber identification module (multi-SIM) Long Term
Evolution (LTE) or multi-SIM LTE-Wideband Code Division Multiple
Access (WCDMA), and may operate in an idle mode, such as a
discontinuous reception (DRX) mode, to conserve power. In the DRX
mode, the UE may periodically wake up during a DRX interval to
monitor one or more channels to determine whether paging
information is available for transmission or reception for the UE.
When in the idle mode, the UE may utilize primary and diversity
antennas for page demodulation and processing of a Master
Information Block (MIB), a System Information Block (SIB), or both,
if its Radio Frequency (RF) hardware supports the same.
[0036] In some cases, the UE may have multiple receive chains but
operate only a single receive (Rx) chain when in an idle mode. A UE
operating a single receive chain may be capable of supporting
multiple wireless services (e.g., LTE-LTE multi-SIM, LTE-WCDMA
multi-SIM, etc.). During a DRX interval, however, the UE may only
be capable of tuning into or monitoring channels carrying paging
messages for a single wireless service. In some instances, paging
message for each of multiple wireless services may be sent, in
which the UE in idle mode wakes up to receive a page. In some
cases, pages of two or more wireless services may be sent in time
intervals that at least partially overlap, resulting in a paging
collision. For example, a UE with dual subscription (or dual-SIM)
may register on two different networks, and pages for the two
subscriptions may be sent during the same or similar time interval,
thus impacting paging monitoring. In some cases, an LTE
subscription 1 and an LTE subscription 2 may have paging cycles of
a fixed duration (e.g., 320 ms) or a multiple of the fixed duration
(e.g., N*320, where N is an integer). In such cases, there is a
certain probability that the paging cycle of each subscription may
persistently overlap, resulting in the UE persistently receiving
paging messages for each subscription at the same or overlapping
times, which may be referred to herein as a paging collision.
[0037] In some cases, the UE may support dual-receive concurrency
across dual-SIM dual-standby (DR-DSDS), which relies on redundancy
in RF front-end capability to support carrier-aggregation (CA). In
such cases, the UE may include additional diplexers and/or RF
front-end hardware, to support concurrent transmission and
reception on multiple frequency bands. A carrier-aggregation
front-end antenna switching module (ASM) of a UE, however, may not
support certain CA band combinations or groups (e.g., LTE carrier
combinations), based on the carrier combinations being associated
with different network operators. For example, in the People's
Republic of China (PRC), the valid CA carrier combinations for
China Mobile Communications Corporation (CMCC) may include B and
(B) 38 (B38) and B41, or B39 and B41. In some cases, however, there
may be no CA carrier requirement for B1/B3 (operated by China
Unicom) and B39, since these may not be valid CA combinations
supported by either of the operators. In such cases, the UE may
operate a single receive chain when B1/B3 and B39 are in use.
Furthermore, in some cases, the paging occasions on B1 and B39 or
B3 and B39 may collide during dual-SIM LTE idle page demodulation
operations.
[0038] A UE having multiple receive chains may experience paging
performance degradation when operating a single receive chain in a
particular frequency band or frequency band group when monitoring
for pages for multiple subscriptions. In some cases, a UE operating
a single receive chain may experience coverage loss and degradation
in paging performance, especially in coverage limited and
interference limited operating regions, such as dense urban areas.
For example, in some cases, dense urban areas comprising high-rise
apartments may result in penetration losses of up to 20 to 30 dB.
Thus, operating in single-receive mode may adversely impact
in-building coverage for UEs operating in such areas, as well as
lead to more frequent paging collisions.
[0039] In accordance with the examples described herein, a UE in
idle mode and operating a single receive chain in a particular
frequency band or frequency band group may monitor for paging
collisions and utilize additional receive chains to improve paging
performance. In some cases, the UE may detect, using a first
receive chain of the UE in an idle mode operating in at least one
frequency band, a collision of paging messages for a first
subscription and a second subscription of the UE during a paging
processing duration. In some cases, the first receive chain may
include at least one antenna path.
[0040] Following detection of paging collisions, the UE may proceed
to determine if there are alternate antenna receive paths on one or
more additional receive chains of the UE that are configured to
operate in the at least one frequency band. In some cases, the UE
may determine that, in a connected mode, the UE is configured to
operate a second receive chain with one or more additional antenna
paths in the at least one frequency band.
[0041] In an example, the UE may determine the presence of
alternate antenna paths based in part on the antenna configuration
of the UE, the antenna capabilities of the UE, or the RF front-end
hardware/software configurations for the UE. In some cases, the UE
may support Higher Order Receive Diversity (HOR.times.D), 4.times.4
Multiple Input Multiple Output (MIMO), or both, in connected mode.
In such cases, the UE may determine the capabilities of one or more
higher order antennas associated with HOR.times.D and 4.times.4
MIMO, and usually used for connected mode, for idle mode page
receiving and demodulation purposes. The UE may allocate, for a
subsequent instance of the paging processing duration, the first
subscription to one of the first receive chain or the second
receive chain, and the second subscription to the other of the
first receive chain or the second receive chain. The UE may
monitor, during the subsequent instance of the paging processing
duration, for a first paging message and a second paging message
using the first and second receive chains
[0042] In some cases, the signal quality or performance for one or
both of the subscriptions may be compromised on the receive chains.
For example, in some cases, both the first and the second
subscriptions may experience poor performance on the antenna paths
associated with the first and second receive chains. In other
cases, one of the first or the second subscriptions may experience
poor performance on the antenna paths associated with the first or
the second receive chain. In some cases, both the first and the
second subscriptions may experience satisfactory performance on the
antenna paths associated with the first and the second receive
chains.
[0043] In some examples, the UE may employ a dynamic decision
making process by estimating or calculating a performance metric
for a subscription on at least one antenna path for each of the
receive chains configured to operate within the at least one
frequency band. In some cases, the performance metric may be one or
more of a Reference Signal Received Power (RSRP), a Received Signal
Strength Indicator (RSSI), a Reference Signal Received Quality
(RSRQ), a Signal to Noise Ratio (SNR), or a Block Error Rate
(BLER), or any other performance metric associated with a received
signal. The UE may rank the antenna paths associated with each of
the receive chains, for each subscription. In some instances, the
UE may then allocate a subscription to at least one antenna path of
a receive chain, based on, for example, the performance metrics and
the ranking. For example, in some cases, the UE may determine that
the performance metrics for one or both subscriptions do not
satisfy a threshold for either of the antenna paths associated with
a first receive chain or a second receive chain. In such cases, the
UE may utilize the ranking to determine the subscription that
receives the highest gain or better performing antenna. For
instance, the UE may determine that both of the first subscription
and the second subscription do not satisfy a threshold on any of
the antenna paths associated with the first and the second receive
chain. In such cases, the UE may decide to allocate the most
optimally performing antenna (or antenna paths) to the subscription
with the lower performance metrics. In other examples, the UE may
determine that the performance metrics for one of the first or the
second subscription do not satisfy a threshold. In such cases, the
UE may allocate the subscription with the lower performance metrics
to an antenna (or antenna path) based on the ranking (e.g., to a
higher ranked antenna). Furthermore, in some cases, the UE may
determine that the performance metrics for both the subscriptions
satisfies the threshold on antenna paths associated with the
receive chains. In such cases, the UE may allocate the first
subscription to the at least one antenna path on the first receive
chain and the second subscription to the at least one antenna path
on the second receive chain.
[0044] Such techniques may allow for a UE to utilize one or more
higher order antennas to achieve dual-receive chain concurrency
during multi-SIM page demodulation.
[0045] Aspects of the disclosure are initially described in the
context of a wireless communications system. Aspects of the
disclosure are further illustrated by and described with respect to
DRX cycle diagrams, apparatus diagrams, system diagrams, and
flowcharts that relate to persistent paging collision enhancement
using dynamically switched higher-order antennas in idle mode.
[0046] FIG. 1 illustrates an example of a wireless communications
system 100 that supports persistent paging collision enhancement
using dynamically switched higher-order antennas in idle mode in
accordance with aspects of the present disclosure. The wireless
communications system 100 includes base stations 105, UEs 115, and
a core network 130. In some examples, the wireless communications
system 100 may be a LTE, LTE-Advanced (LTE-A) network, or a New
Radio (NR) network. In some cases, wireless communications system
100 may support enhanced broadband communications, ultra-reliable
(i.e., mission critical) communications, low latency
communications, and communications with low-cost and low-complexity
devices.
[0047] The UE 115 in idle mode and operating a single receive chain
in a particular frequency band or frequency band group may monitor
for paging collisions and utilize additional receive chains to
improve paging performance. In some instances, the UE 115 in idle
may allocate subscriptions to different combinations of receive
chains and a set of one or more antennas to improve paging
performance.
[0048] Base stations 105 may wirelessly communicate with UEs 115
via one or more base station antennas. Each base station 105 may
provide communication coverage for a respective geographic coverage
area 110. Communication links 125 shown in wireless communications
system 100 may include uplink transmissions from a UE 115 to a base
station 105, or downlink transmissions, from a base station 105 to
a UE 115. Control information and data may be multiplexed on an
uplink channel or downlink according to various techniques. Control
information and data may be multiplexed on a downlink channel, for
example, using time division multiplexing (TDM) techniques,
frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM
techniques. In some examples, the control information transmitted
during a transmission time interval (TTI) of a downlink channel may
be distributed between different control regions in a cascaded
manner (e.g., between a common control region and one or more
UE-specific control regions).
[0049] UEs 115 may be dispersed throughout the wireless
communications system 100, and each UE 115 may be stationary or
mobile. A UE 115 may also be referred to as a mobile station, a
subscriber station, a mobile unit, a subscriber unit, a wireless
unit, a remote unit, a mobile device, a wireless device, a wireless
communications device, a remote device, a mobile subscriber
station, an access terminal, a mobile terminal, a wireless
terminal, a remote terminal, a handset, a user agent, a mobile
client, a client, or some other suitable terminology. A UE 115 may
also be a cellular phone, a personal digital assistant (PDA), a
wireless modem, a wireless communications device, a handheld
device, a tablet computer, a laptop computer, a cordless phone, a
personal electronic device, a handheld device, a personal computer,
a wireless local loop (WLL) station, an Internet of Things (IoT)
device, an Internet of Everything (IoE) device, a machine type
communication (MTC) device, an appliance, an automobile, or the
like.
[0050] In some cases, a UE 115 may also be able to communicate
directly with other UEs (e.g., using a peer-to-peer (P2P) or
device-to-device (D2D) protocol). One or more of a group of UEs 115
utilizing D2D communications may be within the coverage area 110 of
a cell. Other UEs 115 in such a group may be outside the coverage
area 110 of a cell, or otherwise unable to receive transmissions
from a base station 105. In some cases, groups of UEs 115
communicating via D2D communications may utilize a one-to-many
(1:M) system in which each UE 115 transmits to every other UE 115
in the group. In some cases, a base station 105 facilitates the
scheduling of resources for D2D communications. In other cases, D2D
communications are carried out independent of a base station
105.
[0051] Some UEs 115, such as MTC or IoT devices, may be low cost or
low complexity devices, and may provide for automated communication
between machines, i.e., Machine-to-Machine (M2M) communication. M2M
or MTC may refer to data communication technologies that allow
devices to communicate with one another or a base station without
human intervention. For example, M2M or MTC may refer to
communications from devices that integrate sensors or meters to
measure or capture information and relay that information to a
central server or application program that can make use of the
information or present the information to humans interacting with
the program or application. Some UEs 115 may be designed to collect
information or enable automated behavior of machines. Examples of
applications for MTC devices include smart metering, inventory
monitoring, water level monitoring, equipment monitoring,
healthcare monitoring, wildlife monitoring, weather and geological
event monitoring, fleet management and tracking, remote security
sensing, physical access control, and transaction-based business
charging.
[0052] In some cases, an MTC device may operate using half-duplex
(one-way) communications at a reduced peak rate. MTC devices may
also be configured to enter a power saving "deep sleep" mode when
not engaging in active communications. In some cases, MTC or IoT
devices may be designed to support mission critical functions and
wireless communications system may be configured to provide
ultra-reliable communications for these functions.
[0053] Base stations 105 may communicate with the core network 130
and with one another. For example, base stations 105 may interface
with the core network 130 through backhaul links 132 (e.g., S1,
etc.). Base stations 105 may communicate with one another over
backhaul links 134 (e.g., X2, etc.) either directly or indirectly
(e.g., through core network 130). Base stations 105 may perform
radio configuration and scheduling for communication with UEs 115,
or may operate under the control of a base station controller (not
shown). In some examples, base stations 105 may be macro cells,
small cells, hot spots, or the like. Base stations 105 may also be
referred to as evolved NodeBs (eNBs) 105.
[0054] A base station 105 may be connected by an S1 interface to
the core network 130. The core network may be an evolved packet
core (EPC), which may include at least one mobility management
entity (MME), at least one serving gateway (S-GW), and at least one
Packet Data Network (PDN) gateway (P-GW). The MME may be the
control node that processes the signaling between the UE 115 and
the EPC. All user Internet Protocol (IP) packets may be transferred
through the S-GW, which itself may be connected to the P-GW. The
P-GW may provide IP address allocation as well as other functions.
The P-GW may be connected to the network operators IP services. The
operators IP services may include the Internet, the Intranet, an IP
Multimedia Subsystem (IMS), and a Packet-Switched (PS) Streaming
Service.
[0055] The core network 130 may provide user authentication, access
authorization, tracking, IP connectivity, and other access,
routing, or mobility functions. At least some of the network
devices, such as base station 105 may include subcomponents such as
an access network entity, which may be an example of an access node
controller (ANC). Each access network entity may communicate with a
number of UEs 115 through a number of other access network
transmission entities, each of which may be an example of a smart
radio head, or a transmission/reception point (TRP). In some
configurations, various functions of each access network entity or
base station 105 may be distributed across various network devices
(e.g., radio heads and access network controllers) or consolidated
into a single network device (e.g., a base station 105).
[0056] Wireless communications system 100 may operate in an
ultra-high frequency (UHF) frequency region using frequency bands
from 700 MHz to 2600 MHz (2.6 GHz), although some networks (e.g., a
wireless local area network (WLAN)) may use frequencies as high as
4 GHz. This region may also be known as the decimeter band, since
the wavelengths range from approximately one decimeter to one meter
in length. UHF waves may propagate mainly by line of sight, and may
be blocked by buildings and environmental features. However, the
waves may penetrate walls sufficiently to provide service to UEs
115 located indoors. Transmission of UHF waves is characterized by
smaller antennas and shorter range (e.g., less than 100 km)
compared to transmission using the smaller frequencies (and longer
waves) of the high frequency (HF) or very high frequency (VHF)
portion of the spectrum. In some cases, wireless communications
system 100 may also utilize extremely high frequency (EHF) portions
of the spectrum (e.g., from 30 GHz to 300 GHz). This region may
also be known as the millimeter band, since the wavelengths range
from approximately one millimeter to one centimeter in length.
Thus, EHF antennas may be even smaller and more closely spaced than
UHF antennas. In some cases, this may facilitate use of antenna
arrays within a UE 115 (e.g., for directional beamforming).
However, EHF transmissions may be subject to even greater
atmospheric attenuation and shorter range than UHF
transmissions.
[0057] Thus, wireless communications system 100 may support
millimeter wave (mmW) communications between UEs 115 and base
stations 105. Devices operating in mmW or EHF bands may have
multiple antennas to allow beamforming. That is, a base station 105
may use multiple antennas or antenna arrays to conduct beamforming
operations for directional communications with a UE 115.
Beamforming (which may also be referred to as spatial filtering or
directional transmission) is a signal processing technique that may
be used at a transmitter (e.g., a base station 105) to shape and/or
steer an overall antenna beam in the direction of a target receiver
(e.g., a UE 115). This may be achieved by combining elements in an
antenna array in such a way that transmitted signals at particular
angles experience constructive interference while others experience
destructive interference.
[0058] MIMO wireless systems use a transmission scheme between a
transmitter (e.g., a base station 105) and a receiver (e.g., a UE
115), where both transmitter and receiver are equipped with
multiple antennas. Some portions of wireless communications system
100 may use beamforming. For example, base station 105 may have an
antenna array with a number of rows and columns of antenna ports
that the base station 105 may use for beamforming in its
communication with UE 115. Signals may be transmitted multiple
times in different directions (e.g., each transmission may be
beamformed differently). A mmW receiver (e.g., a UE 115) may try
multiple beams (e.g., antenna subarrays) while receiving the
synchronization signals.
[0059] In some cases, the antennas of a base station 105 or UE 115
may be located within one or more antenna arrays, which may support
beamforming or MIMO operation. One or more base station antennas or
antenna arrays may be collocated at an antenna assembly, such as an
antenna tower. In some cases, antennas or antenna arrays associated
with a base station 105 may be located in diverse geographic
locations. A base station 105 may multiple use antennas or antenna
arrays to conduct beamforming operations for directional
communications with a UE 115.
[0060] In some cases, wireless communications system 100 may be a
packet-based network that operate according to a layered protocol
stack. In the user plane, communications at the bearer or Packet
Data Convergence Protocol (PDCP) layer may be IP-based. A Radio
Link Control (RLC) layer may in some cases perform packet
segmentation and reassembly to communicate over logical channels. A
Medium Access Control (MAC) layer may perform priority handling and
multiplexing of logical channels into transport channels. The MAC
layer may also use hybrid automatic repeat request (HARD) to
provide retransmission at the MAC layer to improve link efficiency.
In the control plane, the Radio Resource Control (RRC) protocol
layer may provide establishment, configuration, and maintenance of
an RRC connection between a UE 115 and a network device, base
station 105, or core network 130 supporting radio bearers for user
plane data. At the Physical (PHY) layer, transport channels may be
mapped to physical channels.
[0061] Time intervals in LTE or NR may be expressed in multiples of
a basic time unit (which may be a sampling period of
T.sub.s=1/30,720,000 seconds). Time resources may be organized
according to radio frames of length of 10 ms
(T.sub.f=307200T.sub.s), which may be identified by a system frame
number (SFN) ranging from 0 to 1023. Each frame may include ten 1
ms subframes numbered from 0 to 9. A subframe may be further
divided into two 0.5 ms slots, each of which contains 6 or 7
modulation symbol periods (depending on the length of the cyclic
prefix prepended to each symbol). Excluding the cyclic prefix, each
symbol contains 2048 sample periods. In some cases the subframe may
be the smallest scheduling unit, also known as a TTI. In other
cases, a TTI may be shorter than a subframe or may be dynamically
selected (e.g., in short TTI bursts or in selected component
carriers using short TTIs).
[0062] A resource element may include one symbol period and one
subcarrier (e.g., a 15 KHz frequency range). A resource block may
contain 12 consecutive subcarriers in the frequency domain and, for
a normal cyclic prefix in each orthogonal frequency-division
multiplexing (OFDM) symbol, 7 consecutive OFDM symbols in the time
domain (1 slot), or 84 resource elements. The number of bits
carried by each resource element may depend on the modulation
scheme (the configuration of symbols that may be selected during
each symbol period). Thus, the more resource blocks that a UE
receives and the higher the modulation scheme, the higher the data
rate may be.
[0063] Wireless communications system 100 may support operation on
multiple cells or carriers, a feature which may be referred to as
carrier aggregation (CA) or multi-carrier operation. A carrier may
also be referred to as a component carrier (CC), a layer, a
channel, etc. The terms "carrier," "component carrier," "cell," and
"channel" may be used interchangeably herein. A UE 115 may be
configured with multiple downlink CCs and one or more uplink CCs
for carrier aggregation. Carrier aggregation may be used with both
frequency division duplexing (FDD) and time division duplexing
(TDD) component carriers.
[0064] In some cases, wireless communications system 100 may
utilize enhanced component carriers (eCCs). An eCC may be
characterized by one or more features including: wider bandwidth,
shorter symbol duration, shorter TTIs, and modified control channel
configuration. In some cases, an eCC may be associated with a
carrier aggregation configuration or a dual connectivity
configuration (e.g., when multiple serving cells have a suboptimal
or non-ideal backhaul link). An eCC may also be configured for use
in unlicensed spectrum or shared spectrum (where more than one
operator is allowed to use the spectrum). An eCC characterized by
wide bandwidth may include one or more segments that may be
utilized by UEs 115 that are not capable of monitoring the whole
bandwidth or prefer to use a limited bandwidth (e.g., to conserve
power).
[0065] In some cases, an eCC may utilize a different symbol
duration than other CCs, which may include use of a reduced symbol
duration as compared with symbol durations of the other CCs. A
shorter symbol duration is associated with increased subcarrier
spacing. A device, such as a UE 115 or base station 105, utilizing
eCCs may transmit wideband signals (e.g., 20, 40, 60, 80 MHz, etc.)
at reduced symbol durations (e.g., 16.67 microseconds). A TTI in
eCC may include one or multiple symbols. In some cases, the TTI
duration (that is, the number of symbols in a TTI) may be
variable.
[0066] A shared radio frequency spectrum band may be utilized in an
NR shared spectrum system. For example, an NR shared spectrum may
utilize any combination of licensed, shared, and unlicensed
spectrums, among others. The flexibility of eCC symbol duration and
subcarrier spacing may allow for the use of eCC across multiple
spectrums. In some examples, NR shared spectrum may increase
spectrum utilization and spectral efficiency, specifically through
dynamic vertical (e.g., across frequency) and horizontal (e.g.,
across time) sharing of resources.
[0067] In some cases, wireless communications system 100 may
utilize both licensed and unlicensed radio frequency spectrum
bands. For example, wireless communications system 100 may employ
LTE License Assisted Access (LTE-LAA) or LTE Unlicensed (LTE U)
radio access technology or NR technology in an unlicensed band such
as the 5 Ghz Industrial, Scientific, and Medical (ISM) band. When
operating in unlicensed radio frequency spectrum bands, wireless
devices such as base stations 105 and UEs 115 may employ
listen-before-talk (LBT) procedures to ensure the channel is clear
before transmitting data. In some cases, operations in unlicensed
bands may be based on a CA configuration in conjunction with CCs
operating in a licensed band. Operations in unlicensed spectrum may
include downlink transmissions, uplink transmissions, or both.
Duplexing in unlicensed spectrum may be based on FDD, TDD, or a
combination of both.
[0068] Wireless communications system 100 illustrates aspects of
persistent paging collision enhancement using dynamically switched
higher order antennas in idle mode between a UE 115, a base station
105, core network 130 (e.g., a core network node), or some
combination. In some examples, a UE 115 may support multiple
subscriptions such as dual or multi-SIM LTE-LTE, LTE-WCDMA, or
LTE-any other 3rd Generation Partnership Project (3GPP) wireless
access technology.
[0069] In some cases, the UE 115 may operate in an idle mode (e.g.,
a DRX mode) to conserve battery life. In such cases, the UE 115 may
wake-up at a specific DRX occasion within a DRX interval (e.g.,
based on a particular paging configuration) to monitor for
potential paging messages from a corresponding subscription. In
some cases, the UE 115 having multiple receive chains may operate a
single receive chain when in idle mode, or may share resources for
simultaneous active/idle activity related to multiple
subscriptions. Each of the multiple subscriptions may be associated
with one or more idle DRX wakeup occasions (or paging cycles). In
some cases, the paging cycles of two or more subscriptions may
collide or overlap, and the UE 115, due to operating only a single
receive chain in at least one frequency band, and may accordingly
monitoring pages of one wireless service and not another wireless
service during the wakeup occasion. The UE 115, the base station
105, and/or other devices in idle mode may implement or more
techniques described in accordance with various aspects of the
present disclosure to dynamically use one or more additional
receive chains and higher order antennas in the same frequency band
or the same frequency band group to improve paging performance.
[0070] FIG. 2 illustrates an example of a wireless communications
system 200 that supports persistent paging collision enhancement
using dynamically switched higher-order antennas in idle mode in
accordance with aspects of the present disclosure. In some
examples, wireless communications system 200 may implement aspects
of wireless communications system 100. The wireless communications
system 200 may include UE 115-a and base stations 105-a and 105-b,
which may be examples of a UE 115 and base stations 105 as
described with reference to FIG. 1. As shown, UE 115-a may
communicate with base stations 105-a and 105-b via communication
links 125-a and 125-b, respectively. UE 115-a may be associated
with multiple subscriptions (i.e., may include multiple SIMs). A
first base station 105-a may provide wireless service to UE 115-a
for a first subscription and a second base station 105-a may
provide wireless service to the UE 115-a for a second subscription.
While the discussion below describes multiple base stations 105
each providing a different wireless service, a single base station
105 may provide wireless service for two or more of the
subscriptions.
[0071] UE 115-a may include a set of antennas 210, two or more
receive chains 215, and page processing component 220, in addition
to other components. Each receive chain 215 may be associate with
some or all of the antennas 210 in the set. As depicted, the UE
115-a may include multiple receive chains 215-a and 215-b and may
include a set of antennas 210-a, 210-b, 210-c, and 210-d. Receive
chain 215-a is associated with antennas 210-a and 210-b (e.g., a
primary antenna and a diversity antenna), and receive chain 215-b
is associated with antennas 210-c and 210-d (e.g., a primary
antenna and a diversity antenna). A receive chain 215 may include a
set of hardware components and corresponding software for wireless
communication. In an example, a receive chain 215 may include one
or more of a switch, a diplexer, a band switcher, a low noise
amplifier, a transceiver, additional components, or any combination
thereof. The switch may be used to select between which antenna, or
set of antennas, is currently being used to transmit or receive by
a particular receive chain 215. The diplexer may be implement
frequency-domain multiplexing. The band selector may select which
frequency band, or frequency band combination, is used for
communication. The low noise amplifier may be electronic amplifier
that amplifies a signal without significantly degrading its
signal-to-noise ratio. The transceiver may be a device configured
to transmit and receive communications via a wireless channel. Page
processing component 220 may select which receive chain and antenna
path are used for communication. An antenna path may include a
particular antenna 210, or set of antennas.
[0072] Wireless communications system 200 illustrates aspects of
different schemes to enable the UE 115-a in idle mode to
dynamically use switched higher order antennas to enhance
persistent paging collisions between base stations 105-a and 105-b.
In some examples, UE 115-a may support multiple subscriptions such
as multi-SIM LTE-LTE or multi-SIM LTE-WCDMA, and may operate in a
DRX mode to conserve power.
[0073] In wireless communications system 200, base stations 105-a
and 105-b may periodically sending a page or a paging message in
one or more channels (e.g., a control channel) during a particular
subframe or set of subframes, and UE 115-a, when in idle mode, may
periodically wake up during a paging processing duration to monitor
the one or more channels for the page. In the DRX mode, UE 115-a
may periodically wake up during a paging processing duration to
monitor one or more channels for a page. In some instances, a time
interval in which base station 105-a sends a page for a first
subscription may at least partially overlap with a time interval
during which base station 105-b sends a page for a second
subscription.
[0074] FIG. 3 illustrates an example of a paging process 300 for a
UE 115 that supports persistent paging collision enhancement using
dynamically switched higher-order antennas in idle mode in
accordance with aspects of the present disclosure. Paging process
300 may include one or more DRX cycles 305 (e.g., DRX cycle 305-a
and DRX cycle 305-b). In some cases, paging process may implemented
by one or more the base stations 105 and UEs 115 as described with
reference to FIGS. 1 and 2.
[0075] In some cases, the UE 115 may share receiving and
transmitting resources for simultaneous active/idle activity for
multiple subscriptions (e.g., Subscription 1 and Subscription 2)
supported by the UE 115. For example, UE 115 may be an example of a
dual-SIM or multi-SIM UE, and may be configured to register on
multiple networks. Furthermore, each of the plurality of
subscriptions may need to wake up at a specific idle DRX occasion
to receive pages or paging messages from a base station 105. In
some cases, the page processing durations of Subscription 1 and
Subscription 2 may collide or overlap, as shown in paging
collisions 310-a and 310-b. For example, a DRX cycle T may repeat
in intervals of a defined number of radio frames (e.g., 32, 64,
128, 256), where nB is a function of T (e.g., nB=4T, 2T, . . . ,
T/32). Due to the way DRX cycles are set up, paging intervals
corresponding to different subscriptions may contiguously collide
with one another, or at least may partially overlap at each
occurrence of the paging intervals.
[0076] Furthermore, due to limited receiving capabilities of the UE
115 (e.g., having a single receive chain), for example, the UE 115
may be capable of monitoring pages of one subscription at a given
instance, thus a paging performance of Subscription 1 and
Subscription 2 may be compromised. In some cases, after detecting
paging collisions between Subscription 1 and Subscription 2, the UE
115 may determine an availability of alternate antenna receive
paths through the use of higher order antennas (e.g., antennas used
in connected mode) associated with one or more other receive
chains. The UE 115 may thus enable concurrent operation in idle
mode of two receive chains, each associated with a single
subscription and a set of antenna paths.
[0077] In some cases, a UE 115 having multiple receive chains may
operate a single receive chain in idle mode to conserve power. A
single receive chain may be capable of tuning into or monitoring
channels carrying paging messages for a single subscription during
a DRX interval.
[0078] In some cases, for a UE 115 operating a single receive chain
in an idle mode, the UE 115 may not support dual concurrent receive
paths on a primary antenna and a diversity antenna, due to sharing
of RF front-end components. Furthermore, each subscription may be
associated with a different wakeup occasion and, in some cases, the
wakeup occasions may at least partially overlap such that pages for
two subscriptions may collide. In some cases, the UE 115 may
operate on the same frequency band or the same frequency band group
to receive wireless service corresponding to each of the
subscriptions, and hence page for each of the subscriptions may be
sent on the same frequency band or the same frequency band group. A
same frequency band group may be a group of non-contiguous
frequency bands. In some cases, paging collisions may occur due to
the UE 115 in idle mode operating a single receive chain that
includes hardware (e.g., an RF front-end diplexer and/or a band
filter) not capable of receiving multiple pages at the same time or
within an overlapping time interval. For example, the RF front
end-end diplexer or band filter of the UE 115 may not be capable of
supporting dual concurrent receive paths.
[0079] When connected to receive wireless service under each of the
subscriptions, the UE 115 may detect whether paging collisions are
occurring. The UE 115, for example, when connecting to receive
service under a particular subscription, may receive signaling from
a base station 105 indicating a periodically occurring time
interval in which to expect to receive a page. The UE 115 may
determine whether the periodically occurring time intervals at
least partially overlap. In another example, the UE 115 may detect
paging collisions by determining that the UE 115 has failed to
receive a defined number of pages within a defined amount of time.
For example, the UE 115 may expect to receive a page at periodic
time intervals (e.g., every 320 milliseconds, 640 milliseconds) and
may determine that a defined number of pages were not received
within a defined amount of time (e.g., within preceding 5 seconds).
For example, the UE 115 may determine that pages in LTE B3 received
via antenna paths including multiples antennas (e.g., primary and
diversity signal/antenna paths) are colliding with pages in another
LTE band (e.g., LTE B40). The UE 115 may determine, using these or
other techniques, that paging collisions have been detected.
[0080] Following detection of paging collisions by the UE 115, for
example, due to the UE 115 in idle mode operating a single receive
chain, the UE 115 may proceed to determine if there are alternate
antenna receive paths on a second (or additional) receive chain 215
that operate in the same frequency band or the same frequency band
group as the first receive chain. In some cases, the UE 115 may
include multiple receive chains that operate in a connected mode
and may determine that the UE 115 includes one or more additional
receive chain and corresponding alternate antenna paths that
operate in the same frequency band or the same frequency band group
as the single receive chain operating in idle mode. The UE 115, for
example, may process an antenna configuration of the UE 115, or the
antenna capabilities of the UE 115, or the RF front-end
hardware/software configurations for the UE 115, RF front-end
configuration (RFC) table, the transceiver device management (TRM),
or any combination thereof, to determine that the one or more
additional receive chains having one or more additional antenna
paths configured to operate in the same frequency band or the same
frequency band group as the single receive chain operating in idle
mode.
[0081] In some cases, the UE 115 may support Higher Order Receive
Diversity (HOR.times.D), 4.times.4 MIMO, or both, in connected
mode. In such cases, the UE 115 may determine the capabilities of
one or more higher order antennas each associated with HOR.times.D
or 4.times.4 MIMO, and usually used for connected mode. Continuing
the above example, the UE 115 may determine if either B3 or B40 has
an alternative receive chain to provide an RF front-end signal path
and antenna-paths besides the antenna paths via one or more
antennas (e.g., an alternative to main primary and diversity
signal/antenna paths) such that one subscriptions may be allocated
to a different receive chain and antenna path combination to allow
full-concurrent dual-receive page demodulation for both B3 and
B40.
[0082] Based on determining that there are one or more alternate
antenna receive paths on a second (or additional) receive chain
that operates in the same frequency band or the same frequency band
group as the first receive chain, the UE 115 may allocate, for a
subsequent instance of the paging processing duration, and
additional instances, the first subscription to one of the first
receive chain or the second receive chain, and the second
subscription to the other of the first receive chain or the second
receive chain. In some cases, the UE 115, in idle mode and during
the subsequent instance of the paging processing duration and each
additional instance, may concurrently operate a first receive chain
and a second receive chain. During the subsequent instance of the
paging processing duration, and each additional instance, the first
receive chain may monitor and attempt to receive a first page
corresponding to a first subscription and the second receive chain
may monitor and attempt to receive a second page corresponding to a
second subscription. In some examples, the UE 115 may decode one or
both of the first and second pages. In some examples, the UE 115,
after waking up to receive one or more pages during a paging
processing duration, may enter a low power mode for a remainder of
a DRX cycle and exit the low power mode during a next instance of
the paging processing duration to receive pages correspond to the
first and second subscriptions. Thus, by concurrently operating
multiple receive chains and corresponding antenna paths, the UE 115
is configured to monitor and receive multiple pages for different
subscriptions in a same frequency band or a same frequency band
group in paging intervals that at least partially overlap, thereby
improving paging performance.
[0083] In some cases, conditions of a wireless channel may impact
paging performance. In an example, the UE 115 in idle mode may be
configured to operate a first receive chain that is associated with
at least one antenna path, but quality of a signal received by the
receive chain via the antenna path may be poor. To improve paging
performance, the UE 115 may monitor a performance metric and use
the performance metric for allocating the receive chains to
subscriptions for monitoring for pages during instances of the
paging processing durations.
[0084] In some examples, the UE 115 may employ a dynamic decision
making process by estimating or calculating a performance metric
for a subscription on at least one antenna path for each of the
available receive chains. In some examples, the performance metric
may be one or more of a RSRP, a RSSI, a RSRQ, a SNR, or a BLER, or
any other performance metric associated with a received signal. As
described with reference to FIG. 2, the page processing component
220 may determine a performance metric for each receive chain for
each antenna path for each subscription. For example, the page
processing component 220 may determine a performance metric for
wireless service for a first subscription using the first receive
chain 215-a operating antenna 210-a, the performance metric for
wireless service for the first subscription using the first receive
chain 215-a operating antenna 210-b, the performance metric for
wireless service for the first subscription using the second
receive chain 215-b operating antenna 210-c, and the performance
metric for wireless service for the first subscription using the
second receive chain 215-a operating antenna 210-d. The page
processing component 220 may also determine the performance metric
for wireless service for a second subscription using the first
receive chain 215-a operating antenna 210-a, the performance metric
for wireless service for the second subscription using the first
receive chain 215-a operating antenna 210-b, the performance metric
for wireless service for a second subscription using the second
receive chain 215-b operating antenna 210-c, and the performance
metric for wireless service for the second subscription using the
second receive chain 215-a operating antenna 210-d. The page
processing component 220 may perform this same technique for any
additional receive chains 215 of the UE 115. The page processing
component 220 may thus have a common performance metric for each
receive chain for each antenna path for each subscription.
[0085] The UE 115 may use the determined performance metrics to
rank the antenna paths associated with receive chains, for each
subscription. The UE 115 may then allocate a subscription to at
least one antenna path of a receive chain, based in part on the
performance metrics and the ranking. The UE 115 may use a
performance metric threshold for determining whether to select
and/or change allocation of a subscription from a particular
receive chain and/or a particular antenna path.
[0086] For example, a UE 115 in idle mode may be configured to
utilize a first receive chain and a first antenna to monitor and
receive pages for two subscriptions. The UE 115 may determine that
the performance metrics associated with the first receive chain and
the first antenna for both subscriptions do not satisfy a
threshold. In such case, the UE 115 may utilize the ranking to
determine the highest ranked receive chain and antenna path
combination and allocate one of the subscriptions to that
combination, and allocate a second one of the subscriptions to the
next highest ranked receive chain and antenna path combination, and
so forth. In an example, the highest ranked receive chain and
antenna path combination may correspond to the antenna of an
available set of antennas that receives the highest gain or
optimally performing antenna. For example, the UE 115 may select an
LTE subscription with the lowest RSRP, the highest BLER, or the
like, and assign that subscription to a receive chain and set of
primary and diversity antennas (e.g., a set of antennas having a
relatively higher total isotropic sensitivity (TIS)).
[0087] In some instances, the UE 115 may determine that the first
subscription and the second subscription do not satisfy a threshold
(e.g., determine that a RSRP is less than or equal to a threshold,
or that a BLER is greater than or equal to a threshold) on any of
the antenna paths associated with any of the receive chains. In
such a case, the UE 115 may use the ranking to allocate a highest
ranking antenna (or antenna paths) and receive chain combination to
the subscription with the lower performance metric, and allocate a
second one of the subscriptions to the next highest ranked receive
chain and antenna path combination, and so forth. For example, the
UE 115 may select an LTE subscription having poor RSRP, the high
BLER, or the like, and assign that subscription to a receive chain
and set of primary and diversity antennas (e.g., a set of antennas
having a relatively higher TIS).
[0088] In other examples, the UE 115 may determine that the
performance metrics for one of the first or the second subscription
do not satisfy a threshold. In such cases, the UE 115 may allocate
the subscription with the lower performance metrics to the highest
antenna (or antenna path) and receive chain combination, which may
or may not be already allocated to the other subscription. The
subscriptions may share the highest ranked receive chain and
antenna path combination, or one of the subscriptions may be
allocated to the next highest ranked receive chain and antenna path
combination (e.g., if paging collisions are detected). For example,
the UE 115 allocate a first LTE subscription to a first receive
chain and corresponding set of primary and diversity antennas, and
a second LTE subscription to a second receive chain and
corresponding set of primary and diversity antennas.
[0089] Further, in some cases, the UE 115 may determine that the
performance metrics for both the subscriptions on their currently
allocated chain and antenna path combinations satisfies the
threshold. In such a case, the UE 115 may maintain allocation of
the first subscription on its currently allocated at least one
antenna path and receive chain combination, and maintain allocation
of the second subscription on its currently allocated at least one
antenna path and receive chain combination. Such techniques may
allow for the UE 115 in idle mode to utilize one or more higher
order antennas and receive chain to achieve dual-receive chain
concurrency during multi-SIM page demodulation.
[0090] In some cases, the UE 115 may dynamically decide, using a
performance metric (e.g., RSRP and BLER) to determine if coverage
or page performance is poor and turn on and/or use additional
antenna paths in idle mode to conserve power. Further, if
performance is poor for each of multiple subscriptions, the UE 115
may rank antenna and receive chain combinations for each
subscription and determine which subscription is allocated which
combination. In some instances, the UE 115 may determine that a
subscription associated with the worst performance metric is
allocated to the highest ranked combination (e.g., is allocated the
receive chain and antenna having a TIS performance per allocated
power Pov). For example, the UE 115 may dynamically configure and
enable an alternative antenna path using performance metric such as
a filtered RSRP is below certain threshold (e.g., RSRP<-110 dBm
to reflect bad coverage), a page decode error above certain
threshold (e.g., >30% BLER), or the like. If the UE 115 is
operating in a duress operation conditions (e.g., operating below
those pre-defined thresholds for one or more performance metrics),
the UE 115 may operate in a single receive chain due to persistent
paging collision or if the receive chains, or other RF front-end,
does not allow full concurrency on the primary and diversity
receive and antenna paths within the same frequency band or
frequency band group.
[0091] FIG. 4 illustrates an example of a flowchart 400 for a UE
115 that supports persistent paging collision enhancement using
dynamically switched higher-order antennas in idle mode in
accordance with aspects of the present disclosure. The UE 115 may
be an example of a UE 115 as described with reference to FIGS. 1
through 3.
[0092] At 405, the UE 115 may determine its dual or multi-SIM
capability in idle mode. The UE 115 may, for example, process an
antenna configuration of the UE 115, or the antenna capabilities of
the UE 115, or the RF front-end hardware/software configurations
for the UE 115, RFC table, the TRM, or any combination thereof.
[0093] At 410, the UE 115 may detect the presence of persistent
paging collisions for a first subscription and a second
subscription, for example, due to operation in a single receive
chain by sharing RF front-end components, or due to the RF
front-end diplexer and/or band filter capabilities of the UE 115.
If no collisions are detected, the flowchart 400 may return to 405.
If paging collisions are detected, the flowchart 400 may proceed to
415.
[0094] At 415, the UE 115 may determine its capability of achieving
full-concurrency using two RF chains and separate antenna paths for
each subscription. In some cases, the determination may be based on
the antenna configuration of the UE 115, or the antenna
capabilities of the UE 115, or the RF front-end hardware/software
configurations for the UE 115, or the RFC table, or the TRM, or a
combination thereof. If able to achieve full-concurrency, the
flowchart 400 may proceed to 420. If unable, the flowchart 400 may
proceed to 430.
[0095] At 420, the UE 115 may allow or enable its two subscriptions
to operate in full dual-receive concurrency.
[0096] In some cases, the UE 115 may determine its incapability of
achieving full dual-receive concurrency at 415. In such cases, the
UE 115 may proceed to determine the presence of one or more
alternative higher order antenna receive paths, as described with
reference to FIGS. 2 and 3. In some cases, the UE 115 may determine
that no feasible higher order antenna receive paths associated with
a second receive chain are configured to operate in the same
frequency band or the same frequency band combination as the first
receive chain of the UE 115 operated in idle mode. In such cases,
at 435, the UE 115 may continue to operate the single receive chain
for both subscriptions.
[0097] In some cases, the UE 115 may determine the presence of one
or more alternative higher order antenna receive paths that may be
operated by an additional receive chain in the same frequency band
or the same frequency band combination. In such cases, the UE 115
may determine one or more performance metrics for each subscription
on at least one antenna path for each receive chain, at 440. In
some cases, the process performed at 440 may be performed as
described with reference to FIGS. 2 and 3.
[0098] At 445, the UE 115 may allocate each subscription to one or
more antenna paths of one or more receive chains, as described with
reference to FIGS. 2 and 3, and may use the allocated receive chain
and antenna path combinations to monitor for paging messages
associated with each of the subscriptions.
[0099] In some cases, the examples described herein may enable a
dual sim UE to make use of all possible antennas, including when
such a UE supports more than 2 antennas for a particular LTE band
(e.g., when UE supports HOR.times.D or 4.times.4 MIMO) to enable
LTE+LTE idle mode full concurrency to alleviate persistent paging
collision. The techniques herein may be applied in other contexts,
such as LTE+WCDMA persistent page collision whereby we determine if
LTE has high-order antennas for the colliding band and make use of
LTE's high-order antennas to enable full-concurrent Rx for both LTE
and WCDMA.
[0100] FIG. 5 shows a diagram 500 of a wireless device 505 that
supports persistent paging collision enhancement using dynamically
switched higher-order antennas in idle mode in accordance with
aspects of the present disclosure. Wireless device 505 may be an
example of aspects of a UE 115 as described herein. Wireless device
505 may include receiver 510, communications manager 515, and
transmitter 520. Wireless device 505 may also include a processor.
Each of these components may be in communication with one another
(e.g., via one or more buses).
[0101] Receiver 510 may receive information such as packets, user
data, or control information associated with various information
channels (e.g., control channels, data channels, and information
related to Persistent Paging Collision Enhancement Using
Dynamically Switched Higher-order Antennas in Idle mode, etc.).
Information may be passed on to other components of the device. The
receiver 510 may be an example of aspects of the transceiver 835 as
described with reference to FIG. 8. The receiver 510 may utilize a
single antenna or a set of antennas.
[0102] Communications manager 515 may be an example of aspects of
the communications manager 815 as described with reference to FIG.
8.
[0103] Communications manager 515 and/or at least some of its
various sub-components may be implemented in hardware, software
executed by a processor, firmware, or any combination thereof. If
implemented in software executed by a processor, the functions of
the communications manager 515 and/or at least some of its various
sub-components may be executed by a general-purpose processor, a
digital signal processor (DSP), an application-specific integrated
circuit (ASIC), an field-programmable gate array (FPGA) or other
programmable logic device, discrete gate or transistor logic,
discrete hardware components, or any combination thereof designed
to perform the functions described in the present disclosure. The
communications manager 515 and/or at least some of its various
sub-components may be physically located at various positions,
including being distributed such that portions of functions are
implemented at different physical locations by one or more physical
devices. In some examples, communications manager 515 and/or at
least some of its various sub-components may be a separate and
distinct component in accordance with various aspects of the
present disclosure. In other examples, communications manager 515
and/or at least some of its various sub-components may be combined
with one or more other hardware components, including but not
limited to an I/O component, a transceiver, a network server,
another computing device, one or more other components described in
the present disclosure, or a combination thereof in accordance with
various aspects of the present disclosure.
[0104] Communications manager 515 may detect, using a first receive
chain of the UE in an idle mode operating in at least one frequency
band, a collision of paging messages for a first subscription and a
second subscription of the UE during a paging processing duration,
the first receive chain including at least one antenna path,
determine that, in a connected mode, the UE is configured to
operate a second receive chain with one or more additional antenna
paths in the at least one frequency band, allocate, for a
subsequent instance of the paging processing duration, the first
subscription to one of the first receive chain or the second
receive chain, and the second subscription to the other of the
first receive chain or the second receive chain, and monitor,
during the subsequent instance of the paging processing duration,
for a first paging message and a second paging message using the
first and second receive chains.
[0105] Transmitter 520 may transmit signals generated by other
components of the device. In some examples, the transmitter 520 may
be collocated with a receiver 510 in a transceiver module. For
example, the transmitter 520 may be an example of aspects of the
transceiver 835 as described with reference to FIG. 8. The
transmitter 520 may utilize a single antenna or a set of
antennas.
[0106] FIG. 6 shows a diagram 600 of a wireless device 605 that
support persistent paging collision enhancement using dynamically
switched higher-order antennas in idle mode in accordance with
aspects of the present disclosure. Wireless device 605 may be an
example of aspects of a wireless device 505 or a UE 115 as
described with reference to FIG. 5. Wireless device 605 may include
receiver 610, communications manager 615, and transmitter 620.
Wireless device 605 may also include a processor. Each of these
components may be in communication with one another (e.g., via one
or more buses).
[0107] Receiver 610 may receive information such as packets, user
data, or control information associated with various information
channels (e.g., control channels, data channels, and information
related to Persistent Paging Collision Enhancement Using
Dynamically Switched Higher-order Antennas in Idle mode, etc.).
Information may be passed on to other components of the device. The
receiver 610 may be an example of aspects of the transceiver 835 as
described with reference to FIG. 8. The receiver 610 may utilize a
single antenna or a set of antennas.
[0108] Communications manager 615 may be an example of aspects of
the communications manager 815 as described with reference to FIG.
8.
[0109] Communications manager 615 may also include collision
component 625, higher-order component 630, allocation component
635, and monitoring component 640.
[0110] Collision component 625 may detect, using a first receive
chain of the UE in an idle mode operating in at least one frequency
band, a collision of paging messages for a first subscription and a
second subscription of the UE during a paging processing duration,
the first receive chain including at least one antenna path. In
some cases, the detecting further includes: determining that a
number of collisions of the paging messages exceeds a
threshold.
[0111] Higher-order component 630 may determine that, in a
connected mode, the UE is configured to operate a second receive
chain with one or more additional antenna paths in the at least one
frequency band. In some cases, the at least one frequency band
includes a group of non-contiguous frequency bands. In some cases,
the determining further includes: determining that the UE supports
Higher Order Receive Diversity (HOR.times.D), or 4.times.4 MIMO, or
both. In some cases, the UE supports multiple subscription
capabilities, and the first subscription corresponds to a first LTE
subscription, and the second subscription corresponds to a second
LTE subscription, a WCDMA subscription, or any other 3GPP wireless
access technology. In some cases, the determining is based on an
antenna configuration, antenna capability of the UE, or both.
[0112] Allocation component 635 may allocate, for a subsequent
instance of the paging processing duration, the first subscription
to one of the first receive chain or the second receive chain, and
the second subscription to the other of the first receive chain or
the second receive chain. In some cases, the allocating is based on
the ranking. In some cases, the allocating is based on determining
that the performance metrics for each of the antenna paths for the
first receive chain or the second receive chain do not satisfy a
threshold for the first subscription and the second subscription.
In some cases, the allocating is based on determining that the
performance metrics for each of the antenna paths for the first
receive chain and the second receive chain do not satisfy a
threshold for one of the first or second subscriptions. In some
cases, the allocating allocates the first subscription to the at
least one antenna path on the first receive chain and the second
subscription to the one or more additional antenna paths on the
second receive chain based on determining that each of the
performance metrics satisfies a threshold.
[0113] Monitoring component 640 may monitor, during the subsequent
instance of the paging processing duration, for a first paging
message and a second paging message using the first and second
receive chains. In some cases, the monitoring further includes:
monitoring at least one antenna path of one of the first receive
chain or the second receive chain allocated to the first
subscription for the first paging message, and at least one antenna
path of the other of the first receive chain or the second receive
chain allocated to the second subscription for the second paging
message. In some cases, the monitoring further includes
concurrently operating the first receive chain and the second
receive chain during the subsequent instance of the paging
processing duration.
[0114] Transmitter 620 may transmit signals generated by other
components of the device. In some examples, the transmitter 620 may
be collocated with a receiver 610 in a transceiver module. For
example, the transmitter 620 may be an example of aspects of the
transceiver 835 as described with reference to FIG. 8. The
transmitter 620 may utilize a single antenna or a set of
antennas.
[0115] FIG. 7 shows a diagram 700 of a communications manager 715
that supports persistent paging collision enhancement using
dynamically switched higher-order antennas in idle mode in
accordance with aspects of the present disclosure. The
communications manager 715 may be an example of aspects of a
communications manager 515, a communications manager 615, or a
communications manager 815 as described with reference to FIGS. 5,
6, and 8. The communications manager 715 may include collision
component 720, higher-order component 725, allocation component
730, monitoring component 735, performance metric component 740,
rank component 745, and decoding component 750. Each of these
modules may communicate, directly or indirectly, with one another
(e.g., via one or more buses).
[0116] Collision component 720 may detect, using a first receive
chain of the UE in an idle mode operating in at least one frequency
band, a collision of paging messages for a first subscription and a
second subscription of the UE during a paging processing duration,
the first receive chain including at least one antenna path. In
some cases, the detecting further includes: determining that a
number of collisions of the paging messages exceeds a
threshold.
[0117] Higher-order component 725 may determine that, in a
connected mode, the UE is configured to operate a second receive
chain with one or more additional antenna paths in the at least one
frequency band. In some cases, the at least one frequency band
includes a group of non-contiguous frequency bands. In some cases,
the determining further includes: determining that the UE supports
Higher Order Receive Diversity (HOR.times.D), or 4.times.4 MIMO, or
both. In some cases, the UE supports multiple subscription
capabilities, and the first subscription corresponds to a first LTE
subscription, and the second subscription corresponds to a second
LTE subscription, a WCDMA subscription, or any other 3GPP wireless
access technology. In some cases, the determining is based on an
antenna configuration, antenna capability of the UE, or both.
[0118] Allocation component 730 may allocate, for a subsequent
instance of the paging processing duration, the first subscription
to one of the first receive chain or the second receive chain, and
the second subscription to the other of the first receive chain or
the second receive chain. In some cases, the allocating is based on
the ranking. In some cases, the allocating is based on determining
that the performance metrics for each of the antenna paths for the
first receive chain or the second receive chain do not satisfy a
threshold for the first subscription and the second subscription.
In some cases, the allocating is based on determining that the
performance metrics for each of the antenna paths for the first
receive chain and the second receive chain do not satisfy a
threshold for one of the first or second subscriptions. In some
cases, the allocating allocates the first subscription to the at
least one antenna path on the first receive chain and the second
subscription to the one or more additional antenna paths on the
second receive chain based on determining that each of the
performance metrics satisfies a threshold.
[0119] Monitoring component 735 may monitor, during the subsequent
instance of the paging processing duration, for a first paging
message and a second paging message using the first and second
receive chains. In some cases, the monitoring further includes:
monitoring at least one antenna path of one of the first receive
chain or the second receive chain allocated to the first
subscription for the first paging message, and at least one antenna
path of the other of the first receive chain or the second receive
chain allocated to the second subscription for the second paging
message. In some cases, the monitoring further includes
concurrently operating the first receive chain and the second
receive chain during the subsequent instance of the paging
processing duration.
[0120] Performance metric component 740 may determine a performance
metric for each of the antenna paths for the first receive chain
and the second receive chain, where the performance metric is one
or more of a RSRP, a RSSI, a RSRQ, a SNR, or a BLER.
[0121] Rank component 745 may rank the antenna paths for the first
receive chain and the second receive chain based on the determined
performance metrics.
[0122] Decoding component 750 may enter a low power mode subsequent
to decoding the first paging message and the second paging message
and exit the low power mode during a next instance of the paging
processing duration. In some cases, the monitoring further
includes: decoding the first paging message and the second paging
message.
[0123] FIG. 8 shows a diagram of a system 800 including a device
805 that supports persistent paging collision enhancement using
dynamically switched higher-order antennas in idle mode in
accordance with aspects of the present disclosure. Device 805 may
be an example of or include the components of wireless device 505,
wireless device 605, or a UE 115, for example, as described with
reference to FIGS. 5 and 6. Device 805 may include components for
bi-directional voice and data communications including components
for transmitting and receiving communications, including
communications manager 815, processor 820, memory 825, software
830, transceiver 835, antenna 840, and I/O controller 845. These
components may be in electronic communication via one or more buses
(e.g., bus 810). Device 805 may communicate wirelessly with one or
more base stations 105.
[0124] Processor 820 may include an intelligent hardware device,
(e.g., a general-purpose processor, a DSP, a central processing
unit (CPU), a microcontroller, an ASIC, an FPGA, a programmable
logic device, a discrete gate or transistor logic component, a
discrete hardware component, or any combination thereof). In some
cases, processor 820 may be configured to operate a memory array
using a memory controller. In other cases, a memory controller may
be integrated into processor 820. Processor 820 may be configured
to execute computer-readable instructions stored in a memory to
perform various functions (e.g., functions or tasks supporting
Persistent Paging Collision Enhancement Using Dynamically Switched
Higher-order Antennas in Idle mode).
[0125] Memory 825 may include random access memory (RAM) and read
only memory (ROM). The memory 825 may store computer-readable,
computer-executable software 830 including instructions that, when
executed, cause the processor to perform various functions
described herein. In some cases, the memory 825 may contain, among
other things, a basic input/output system (BIOS) which may control
basic hardware or software operation such as the interaction with
peripheral components or devices.
[0126] Software 830 may include code to implement aspects of the
present disclosure, including code to support Persistent Paging
Collision Enhancement Using Dynamically Switched Higher-order
Antennas in Idle mode. Software 830 may be stored in a
non-transitory computer-readable medium such as system memory or
other memory. In some cases, the software 830 may not be directly
executable by the processor but may cause a computer (e.g., when
compiled and executed) to perform functions described herein.
[0127] Transceiver 835 may communicate bi-directionally, via one or
more antennas, wired, or wireless links as described above. For
example, the transceiver 835 may represent a wireless transceiver
and may communicate bi-directionally with another wireless
transceiver. The transceiver 835 may also include a modem to
modulate the packets and provide the modulated packets to the
antennas for transmission, and to demodulate packets received from
the antennas.
[0128] In some cases, the wireless device may include a single
antenna 840. However, in some cases the device may have more than
one antenna 840, which may be capable of concurrently transmitting
or receiving multiple wireless transmissions.
[0129] I/O controller 845 may manage input and output signals for
device 805. I/O controller 845 may also manage peripherals not
integrated into device 805. In some cases, I/O controller 845 may
represent a physical connection or port to an external peripheral.
In some cases, I/O controller 845 may utilize an operating system
such as iOS.RTM., ANDROID.RTM., MS-DOS.RTM., MS-WINDOWS.RTM.,
OS/2.RTM., UNIX.RTM., LINUX.RTM., or another known operating
system. In other cases, I/O controller 845 may represent or
interact with a modem, a keyboard, a mouse, a touchscreen, or a
similar device. In some cases, I/O controller 845 may be
implemented as part of a processor. In some cases, a user may
interact with device 805 via I/O controller 845 or via hardware
components controlled by I/O controller 845.
[0130] FIG. 9 shows a flowchart illustrating a method 900 for
persistent paging collision enhancement using dynamically switched
higher-order antennas in idle mode in accordance with aspects of
the present disclosure. The operations of method 900 may be
implemented by a UE 115 or its components as described herein. For
example, the operations of method 900 may be performed by a
communications manager as described with reference to FIGS. 5
through 8. In some examples, a UE 115 may execute a set of codes to
control the functional elements of the device to perform the
functions described below. Additionally or alternatively, the UE
115 may perform aspects of the functions described below using
special-purpose hardware.
[0131] At 905 the UE 115 may detect, using a first receive chain of
the UE in an idle mode operating in at least one frequency band, a
collision of paging messages for a first subscription and a second
subscription of the UE during a paging processing duration, the
first receive chain including at least one antenna path. The
operations of 905 may be performed according to the methods
described herein. In certain examples, aspects of the operations of
905 may be performed by a collision component as described with
reference to FIGS. 5 through 8.
[0132] At 910 the UE 115 may determine that, in a connected mode,
the UE is configured to operate a second receive chain with one or
more additional antenna paths in the at least one frequency band.
The operations of 910 may be performed according to the methods
described herein. In certain examples, aspects of the operations of
910 may be performed by a higher-order component as described with
reference to FIGS. 5 through 8.
[0133] At 915 the UE 115 may allocate, for a subsequent instance of
the paging processing duration, the first subscription to one of
the first receive chain or the second receive chain, and the second
subscription to the other of the first receive chain or the second
receive chain. The operations of 915 may be performed according to
the methods described herein. In certain examples, aspects of the
operations of 915 may be performed by an allocation component as
described with reference to FIGS. 5 through 8.
[0134] At 920 the UE 115 may monitor, during the subsequent
instance of the paging processing duration, for a first paging
message and a second paging message using the first and second
receive chains. The operations of 920 may be performed according to
the methods described herein. In certain examples, aspects of the
operations of 920 may be performed by a monitoring component as
described with reference to FIGS. 5 through 8.
[0135] In some examples, aspects from two or more of the methods
may be combined. It should be noted that the methods are just
example implementations, and that the operations of the methods may
be rearranged or otherwise modified such that other implementations
are possible.
[0136] Techniques described herein may be used for various wireless
communications systems such as code division multiple access
(CDMA), time division multiple access (TDMA), frequency division
multiple access (FDMA), orthogonal frequency division multiple
access (OFDMA), single carrier frequency division multiple access
(SC-FDMA), and other systems. The terms "system" and "network" are
often used interchangeably. A CDMA system may implement a radio
technology such as CDMA2000, Universal Terrestrial Radio Access
(UTRA), etc. CDMA2000 covers IS-2000, IS-95, and IS-856 standards.
IS-2000 Releases may be commonly referred to as CDMA2000 1X, 1X,
etc. IS-856 (TIA-856) is commonly referred to as CDMA2000
1.times.EV-DO, High Rate Packet Data (HRPD), etc. UTRA includes
WCDMA and other variants of CDMA. A TDMA system may implement a
radio technology such as Global System for Mobile Communications
(GSM).
[0137] An OFDMA system may implement a radio technology such as
Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), Institute of
Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE
802.16 (WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are
part of Universal Mobile Telecommunications System (UMTS). LTE and
LTE-A are releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS,
LTE, LTE-A, NR, and GSM are described in documents from the
organization named "3rd Generation Partnership Project" (3GPP).
CDMA2000 and UMB are described in documents from an organization
named "3rd Generation Partnership Project 2" (3GPP2). The
techniques described herein may be used for the systems and radio
technologies mentioned above as well as other systems and radio
technologies. While aspects of an LTE or an NR system may be
described for purposes of example, and LTE or NR terminology may be
used in much of the description, the techniques described herein
are applicable beyond LTE or NR applications.
[0138] In LTE/LTE-A networks, including such networks described
herein, the term evolved node B (eNB) may be generally used to
describe the base stations. The wireless communications system or
systems described herein may include a heterogeneous LTE/LTE-A or
NR network in which different types of eNBs provide coverage for
various geographical regions. For example, each eNB, next
generation NodeB (gNB), or base station may provide communication
coverage for a macro cell, a small cell, or other types of cell.
The term "cell" may be used to describe a base station, a carrier
or component carrier associated with a base station, or a coverage
area (e.g., sector, etc.) of a carrier or base station, depending
on context.
[0139] Base stations may include or may be referred to by those
skilled in the art as a base transceiver station, a radio base
station, an access point, a radio transceiver, a NodeB, eNodeB
(eNB), gNB, Home NodeB, a Home eNodeB, or some other suitable
terminology. The geographic coverage area for a base station may be
divided into sectors making up only a portion of the coverage area.
The wireless communications system or systems described herein may
include base stations of different types (e.g., macro or small cell
base stations). The UEs described herein may be able to communicate
with various types of base stations and network equipment including
macro eNBs, small cell eNBs, gNBs, relay base stations, and the
like. There may be overlapping geographic coverage areas for
different technologies.
[0140] A macro cell generally covers a relatively large geographic
area (e.g., several kilometers in radius) and may allow
unrestricted access by UEs with service subscriptions with the
network provider. A small cell is a lower-powered base station, as
compared with a macro cell, that may operate in the same or
different (e.g., licensed, unlicensed, etc.) frequency bands as
macro cells. Small cells may include pico cells, femto cells, and
micro cells according to various examples. A pico cell, for
example, may cover a small geographic area and may allow
unrestricted access by UEs with service subscriptions with the
network provider. A femto cell may also cover a small geographic
area (e.g., a home) and may provide restricted access by UEs having
an association with the femto cell (e.g., UEs in a closed
subscriber group (CSG), UEs for users in the home, and the like).
An eNB for a macro cell may be referred to as a macro eNB. An eNB
for a small cell may be referred to as a small cell eNB, a pico
eNB, a femto eNB, or a home eNB. An eNB may support one or multiple
(e.g., two, three, four, and the like) cells (e.g., component
carriers).
[0141] The wireless communications system or systems described
herein may support synchronous or asynchronous operation. For
synchronous operation, the base stations may have similar frame
timing, and transmissions from different base stations may be
approximately aligned in time. For asynchronous operation, the base
stations may have different frame timing, and transmissions from
different base stations may not be aligned in time. The techniques
described herein may be used for either synchronous or asynchronous
operations.
[0142] The downlink transmissions described herein may also be
called forward link transmissions while the uplink transmissions
may also be called reverse link transmissions. Each communication
link described herein--including, for example, wireless
communications systems 100 and 200 as described with reference to
FIGS. 1 and 2--may include one or more carriers, where each carrier
may be a signal made up of multiple sub-carriers (e.g., waveform
signals of different frequencies).
[0143] The description set forth herein, in connection with the
appended drawings, describes example configurations and does not
represent all the examples that may be implemented or that are
within the scope of the claims. The term "exemplary" used herein
means "serving as an example, instance, or illustration," and not
"preferred" or "advantageous over other examples." The detailed
description includes specific details for the purpose of providing
an understanding of the described techniques. These techniques,
however, may be practiced without these specific details. In some
instances, well-known structures and devices are shown in diagram
form in order to avoid obscuring the concepts of the described
examples.
[0144] In the appended figures, similar components or features may
have the same reference label. Further, various components of the
same type may be distinguished by following the reference label by
a dash and a second label that distinguishes among the similar
components. If just the first reference label is used in the
specification, the description is applicable to any one of the
similar components having the same first reference label
irrespective of the second reference label.
[0145] Information and signals described herein may be represented
using any of a variety of different technologies and techniques.
For example, data, instructions, commands, information, signals,
bits, symbols, and chips that may be referenced throughout the
above description may be represented by voltages, currents,
electromagnetic waves, magnetic fields or particles, optical fields
or particles, or any combination thereof.
[0146] The various illustrative blocks and modules described in
connection with the disclosure herein may be implemented or
performed with a general-purpose processor, a DSP, an ASIC, an FPGA
or other programmable logic device, discrete gate or transistor
logic, discrete hardware components, or any combination thereof
designed to perform the functions described herein. A
general-purpose processor may be a microprocessor, but in the
alternative, the processor may be any conventional processor,
controller, microcontroller, or state machine. A processor may also
be implemented as a combination of computing devices (e.g., a
combination of a DSP and a microprocessor, multiple
microprocessors, one or more microprocessors in conjunction with a
DSP core, or any other such configuration).
[0147] The functions described herein may be implemented in
hardware, software executed by a processor, firmware, or any
combination thereof If implemented in software executed by a
processor, the functions may be stored on or transmitted over as
one or more instructions or code on a computer-readable medium.
Other examples and implementations are within the scope and spirit
of the disclosure and appended claims. For example, due to the
nature of software, functions described above can be implemented
using software executed by a processor, hardware, firmware,
hardwiring, or combinations of any of these. Features implementing
functions may also be physically located at various positions,
including being distributed such that portions of functions are
implemented at different physical locations. As used herein,
including in the claims, the term "and/or," when used in a list of
two or more items, means that any one of the listed items can be
employed by itself, or any combination of two or more of the listed
items can be employed. For example, if a composition is described
as containing components A, B, and/or C, the composition can
contain A alone; B alone; C alone; A and B in combination; A and C
in combination; B and C in combination; or A, B, and C in
combination. Also, as used herein, including in the claims, "or" as
used in a list of items (for example, a list of items prefaced by a
phrase such as "at least one of" or "one or more of") indicates a
disjunctive list such that, for example, a list of "at least one of
A, B, or C" means A or B or C or AB or AC or BC or ABC (i.e., A and
B and C).
[0148] As used herein, the phrase "based on" shall not be construed
as a reference to a closed set of conditions. For example, an
exemplary feature that is described as "based on condition A" may
be based on both a condition A and a condition B without departing
from the scope of the present disclosure. In other words, as used
herein, the phrase "based on" shall be construed in the same manner
as the phrase "based at least in part on."
[0149] Computer-readable media includes both non-transitory
computer storage media and communication media including any medium
that facilitates transfer of a computer program from one place to
another. A non-transitory storage medium may be any available
medium that can be accessed by a general purpose or special purpose
computer. By way of example, and not limitation, non-transitory
computer-readable media can comprise RAM, ROM, electrically
erasable programmable read only memory (EEPROM), compact disk (CD)
ROM or other optical disk storage, magnetic disk storage or other
magnetic storage devices, or any other non-transitory medium that
can be used to carry or store desired program code means in the
form of instructions or data structures and that can be accessed by
a general-purpose or special-purpose computer, or a general-purpose
or special-purpose processor. Also, any connection is properly
termed a computer-readable medium. For example, if the software is
transmitted from a website, server, or other remote source using a
coaxial cable, fiber optic cable, twisted pair, digital subscriber
line (DSL), or wireless technologies such as infrared, radio, and
microwave, then the coaxial cable, fiber optic cable, twisted pair,
DSL, or wireless technologies such as infrared, radio, and
microwave are included in the definition of medium. Disk and disc,
as used herein, include CD, laser disc, optical disc, digital
versatile disc (DVD), floppy disk and Blu-ray disc where disks
usually reproduce data magnetically, while discs reproduce data
optically with lasers. Combinations of the above are also included
within the scope of computer-readable media.
[0150] The description herein is provided to enable a person
skilled in the art to make or use the disclosure. Various
modifications to the disclosure will be readily apparent to those
skilled in the art, and the generic principles defined herein may
be applied to other variations without departing from the scope of
the disclosure. Thus, the disclosure is not limited to the examples
and designs described herein, but is to be accorded the broadest
scope consistent with the principles and novel features disclosed
herein.
* * * * *